Magneto for internal-combustion engines.



R. A. OGLESBY.

MAGNETO FOR INTERNAL COMBUSTION ENGINES. APPiLICAT IONFILED MAR. 19. 19 7.

Patented A pr. 15, 1919 2 SHEETSSHEET 1.

3% yaw. a??? R. A. OGLESBY. MAGNETO FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED MAR. 19. I917.

lajontv Apr- I 3 EETSSHEET 2- N iiiii' .2%): E I I atbomm UNITED STATES PATENT OFFICE.

RICHARD A. OGLESIBY, OF SOUTH BEND, INDIANA, ASSIGNOR TO QUICK ACTION IGNITION COMPANY, OF SOUTH BEND, INDIANA, A CORPORATION OF INDIANA.

Specification of Ietters Patent.

Patented Apr. 15, 1919.

Application filed March 19,1917. Serial No. 155,917.

To all whom it may concern:

Be it known that I, RICHARD A. OGLESBY, a citizen of the United States, residing at South Bend. in the county of St. Joseph and State of Indiana, have invented certain new and useful Improvements in Magnetos for Internal-Combustion Engines, of which the following is a. specification.

My invention relates to improvements in magneto for internal combust on engine and it more especially appertains to the features pointed out in the annexed claims.

The purpose of my invention is to provide a magneto of the rotating field magnet type that embodies certain features which lend themselves to economic production, ease of assembling, and high efficiency in operation; that groups certain elements as complete separable units; and that provides for the easy removal or adjustment of functional groups without dismantling the major structure.

\Vith these and other ends in view I illustrate in the accompanying drawings such instances of adaptation as will disclose the fundamentally broad features without limiting myself to the specific details instanced.

Figure 1 is an outside front elevation of a magneto magnet casing.

Fig. 2 is a rear elevation of an armature plate with its accessories.

Fig. 3 is an inside elevation of the magnet casing.

Fig. 4 is a transverse elevation of Fig. 3 in section.

Fig. 5 is an inside elevation of an armature plate without its attachments.

Fig. 6 is an elevation in sect-ion showing an adaptation for supporting the same.

Fig. 7 is an enlarged elevation in section on a plane parallel to the axis of the magneto instancing the related parts in assembled relation.

Fig. 8 is an interior elevation of an annature plate with its accessories attached.

Fig. 9 is a plan view of Fig. 8.

Fig. 10 is a plan view instancing the assembled relation of an armature plate and magnet casing in section.

Fig. 11 is an elevation-of a circuit breaker unit.

Fig. 12 is a plan view in section of a com bined circuit breaker and condenser unit.

Fig. 13 is a' plan view of the armature heads and their connecting core.

1 4 is a diagram inst-ancing a relation of circuits.

Fig. 15 is an elevation of a circuit breaker contact control.

In carrying out the instanced form of magneto construction the various parts are supported on a stationary portion 6 of an I adjacent engine or other casing which has a hub 7 in which the crank shaft 46 has bearing. The shaft may have a shoulder or collar to prevent endwise movement outwardly in the hub, as shown in Fig. 6. The hub 7 forms a support on which an armature plate 1 is held by means of its hub 2. This plate has a shoulder 18 to form a clearance for magnet 55 and it may be retained on the hub in case it is to be rocked thereon for changes in sparking position by set screws 9 which terminate in an annular groove 8 formed in the hub 7. If an armature plate is to be held in one position for fixed ignition then a clamping screw 5 is utilized to draw toward each other the projections of the hub 2. These are separated by an axial slot 3 from each other and both from the main part of the hub by a radial slot 4 as shown in Figs. 6 and 10. As the screw 5 is drawn up the hub 2 is clamped on the hub 7 and is held in one position. This provision may also be used when variable sparking relations are utilized to take up any wear that may develop between hubs 2 and 7.

The shaft 46 projects through the hub 7 and terminates in a tapered end 47 on which the magnet supporting dome or casing is secured by a suitable key or otherwise. The dome has a body web 50 and a flange 51 to which the magnet 55 is attached by screws or rivets, etc. This magnet may be continuous except for its air gap as shown in Fig. 3 or it may be made in two parts, each part having a pair of detachable pole pieces 56 secured to the dome in close contact with the ends of the magnet. To accommodate various diameters of magnets the casing 50 is formed separately from its central support 49 by means of which it is secured to the shaft 46 thus effecting economies in production as various sized magnet casings may be secured to one form of central support. The central support 49 may be flanged to enter an opening in the dome 50, to which it may be secured by rivets or otherwise. It carries the circuit breaker cam 48 as shown in Figs. 3 and 9.

In order that the parts of the stationary armature may be accessible for adjustment or inspection without removing the dome from the shaft 46 an opening 52 is formed in the casing web 50. This makes the ad justment of the breaker contacts 39 and 40 or the removal of the breaker-condenser unit 20 from the armature plate 1 feasible if the removal is ever found necessary. The opening 52 is large enough to meet all practical requirements and is closed by a plate 58 which may be pivoted at 53. It has a slot 54 at-its free end which passes under a suitable screw by means of which it is held in place when the opening 52 is not used.

As the magnet pole laminations 56 successively pass the heads 15 of the armature periodic impulses are set up in the armature coil 25 which wax and wane as a unidirectional flux is swept across the heads and coil in alternating sequence. If the magnet is made in two halves and the armature is formed with a pair of coils (not shown) a reversal of flux will take place at each moment when poles 56 successively pass the armature heads 15.

The armature plate 1 is provided with a recess 10 for the coil 14, another 11 for the condenser 22 and a third 12 for a removable terminal connector 29. The plate 1 may be provided with a. boss 13 to which a spark shifting rod is attached if such an adaptation is desired. The laminated armature heads 15 with core 17 are formed with overhangs 16 so" as to provide a proper length of the heads to span the air gap of the field magnet between its poles 56. The clearance between such heads forms a lengthened space for-the coil 14. Heads 15 may be formed with the core as a unit and attached to plate 1 by screws or any other suitable manner. A plate 19 may be used over each head to receive the necessary screws or other fastenings.

This method of construction makes it eas to employ form Wound coils notwithstaning the use of overhanging projections 16. The core 17 'may be formed of two halves 17, one half longer than the other, to the ends of which heads 15 are secured. At least one of these heads is fastened after the core, with the other head attached, has been placed in the coil. To simplify the steps of manufacture both heads may be made detachable and duplicates of each other though if desired the core and one head may be formed as a laminated unit and the other head attached to the projecting end of the ent is dependent on the contiguous construc tion of the plate 1.

The circuit breaker-condenser unit comprises a base 20 to which a casing 21 is attached as shown in Fig. 12. 'Inside this casing the condenser 22 is placed. It has one terminal grounded at 23 and the other connected to primary coil terminal 44 so as to place the condenser in parallel relation to the circuit breaker contacts 39 and 40. On

the upper side of base 20 four studs or bosses are formed. One of the lower ones (Fig. 11) 37 serves to hold the retaining plate 38 and also forms an abutment for one end of tension spring 36.- A second post 60 to the right of post 37 supports the circuit breaker hub 35 pivoted on stud 59 carries contact spring 34 and breaker arm 33. These parts .are instantly .removable by swinging spring plate 38 to one side and they are retained in working relation through an indentation on the under side of the spring engaging the end of the pivot stud 59. The post 60 also serves to retain tension sprin 36 in position so that one end abuts post 3 and the other engagesthe breaker arm 33 to normally keep the con- The secondary winding 24 is grounded at one end and the other ends in terminal 26. A suitable insulating filler 27 surrounds the same and an in'sulating'tube 28 forms a recess into which the spring end of terminal plug 29 protrudes so as to contact with the secondary winding 24 at 26. The plug 29 has a cable 30 and a connector end 31. A natural safety gap 32 is formed Ibetween the tube 28 and the metal of the armature plate.

From the description;v and the drawing it will be seen that the several parts are compactly arranged and susceptible of rapid assemblage with the least liability of mistake being made. The magneto forms an eflicient device in practice and one affording large economies in production.

What I claim is,

1. In magnetos, a stationary armature plate, a central opening theretlirough, an external support, a hub projecting therefrom, means connected to the plate adapted to secure the same on the hub, a shaft extending through the hub, an annular central support attached thereto, a magnet casing secured to the support, the casing and sup- "unit held on the plate, a breaker cam rotated by the shaft, a detachable connector plug and cable passing into the armature plate from the rear side thereof, and suitable circuit connections between the windingsbreaker condenser and terminal plug.

2. In magnetos, an armature plate, in ductor elements secured thereon, a combined circuit breaker and condenser unit connected therewith both being attached to the inner face of the plate, a removable connection plug in operative relation to these parts held on the opposite side of the plate and passing through the same, a safety gap combined with such plug, and a rotating field magnet adapted to pass adjacent the inductor.

3. In magneto armatures, a stator plate, suitable windings thereon adapted to gen erate electric currents when subjected to a magnetic flux, a detachable circuit breaker and condenser unit connected therewith, a

suitable safety gap in relation to the windings and a removable plug terminal therefor held on the plate.

4. In magneto armatures, a supporting plate, a plurality of permeable heads at tachcd thereto, connections therebetween having similar magnetic characteristics, windings between the heads, a rotating permanent magnet movable adjacent the heads, a cam rotatable in synchronism with the magnet, a circuit breaker operated by the cam, said breaker combining a condenser in connection therewith both constituting an independent assem-blable unit.

5. In inagnetos, an armature plate, a support therefor, heads with a core and windings therebetween secured to the plate, means for holding the plate against rotation on its support, a rotatable shaft passing centrally through the support, a flanged cas ing carried by the shaft on one side of the armature plate, an opening in the casing adapted to be brought in alinement with the breaker whereby the breaker is made accessible without removing the casing from its shaft, and means for closing the opening.

6. In magnetos, a stationary armature, a rotatable casing inclosing the armature and having a permanent magnet therein, and an opening formed in the casing opposite the armature parts whereby the same are made accessible without a removal of the casing.

7. In magnetos, a support having front and rear surfaces, a condenser attached to one face of the support and a circuit breaker secured to the other face of the support and attached parts constituting an independent assemblable unit.

8. An armature plate, a split hub therefor means for contracting the hub, a de pression therein to receive a coil, another depression on the same face adapted to receive a condenser-breaker unit, a terminal recess formed in the other face of the plate, and a support for the hub.

9. A condenser-breaker unit, comprising a single support to one surface of which the breaker elements are attached, and to the surface on the opposite side of said support a condenser is secured.

10. A one-piece breaker terminal, a breaker point held therebetween, and means for closing the free ends of the terminal to clamp the point and opening the same to free the point.

11. A shaft, a bearing therefor, a hub projecting from the bearing, an armature plate, a hub thereof supported by the bearing hub, means for rocking the plate on the latter hub, and means for clamping the hub against movement whenever desired.

In testimony whereof I affix my signature in the presence of two witnesses.

RICHARD A. OGLESBY.

Witnesses:

A. L. AMs'rUTz, N. S. AMSTUTZ. 

